'use strict';
let number_map_to_word_over_26 = function(collection){
  var s = [];
  for (let i = 0; i < 26; i++) {
    s.push(String.fromCharCode(97 + i));
  }
  var ii = 26;
  var k = s;
  for ( let i = 0; i <= 25; i++) {
    for ( let j = 0; j <= 25; j++) {
      k[ii] = s[i] + s[j];
      ii++;
    }
  }
  return collection.map(item=>k[item-1]);
};

module.exports = number_map_to_word_over_26;
